[utils]: add futures util feature to server (#305)

Author: niklasad1

utils/Cargo.toml

@@ -22,7 +22,7 @@ serde_json = { version = "1", features = ["raw_value"], optional = true }
 default = []
 hyper_13 = ["hyper13", "futures-util", "jsonrpsee-types"]
 hyper_14 = ["hyper14", "futures-util", "jsonrpsee-types"]
-server = ["anyhow", "futures-channel", "jsonrpsee-types", "rustc-hash", "serde", "serde_json", "log"]
+server = ["anyhow", "futures-channel", "futures-util", "jsonrpsee-types", "rustc-hash", "serde", "serde_json", "log"]
 
 [dev-dependencies]
 serde_json = "1.0"